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1. 发明授权

US4718116A Method and apparatus for receiving a compressed composite signal 失效
标题翻译：用于接收压缩复合信号的方法和装置
公开(公告)号：US4718116A
公开(公告)日：1988-01-05
申请号：US807641
申请日：1985-12-11
申请人： Paul H. Jacobs , Douglas P. Collette
发明人： Paul H. Jacobs , Douglas P. Collette
IPC分类号： H04B1/64 , H04B1/68 , H04B1/16
CPC分类号： H04B1/68 , H04B1/64
摘要： A compressed single side band communication system and method in which the audio signal is compressed prior to pre-emphasis and thereafter summed with a pilot tone for further compression prior to transmission. Initially, only the pilot tone is transmitted at full rated power to aid in acquisition of the signal by the receiver. Thereafter, the transmitter ALC is disabled and the pilot tone is attenuated. The receiver adjusts the frequency characteristics of the pilot tone filter and phase lock loop filter in the detector as a function of lock-on. The delay after loss of lock-on in reverting to wide band pilot tone and wideband loop filters is varied as a function of signal strength. The pilot tone may be frequency modulated for tone coded squelch, with the modulating source being located in the return end of the phase lock loop filter. A unique filter is provided to insure acquisition of the pilot tone. Automatic gain control of the audio signal is responsive to the tone signal without affecting the composite audio and tone signal. The audio signal and piot tone may be weighted and summed to maintain a constant amplitude signal to the squelch detector to reduce undersired operation in the presence of audio peaks.
摘要翻译：一种压缩单边带通信系统和方法，其中音频信号在预加重之前被压缩，然后在传输之前与用于进一步压缩的导频音相加。最初，只有导频音以全额定功率传输，以帮助接收机获取信号。此后，发射机ALC被禁用并且导频音被衰减。接收机调节检测器中导频音滤波器和锁相环滤波器的频率特性，作为锁定功能。作为信号强度的函数，响应于宽带导频和宽带环路滤波器的锁定失去锁定之后的延迟是变化的。导频音调可以对音调编码的静噪进行频率调制，调制源位于锁相环滤波器的返回端。提供一个唯一的滤波器来确保采集导频音。音频信号的自动增益控制响应于音调信号而不影响复合音频和音调信号。可以对音频信号和波音音调进行加权和求和，以将静态幅度信号维持在静噪检测器上，以减少在存在音频峰值的情况下的较低的操作。

2. 发明授权

US4573208A Compressed single side band communications system and method 失效
标题翻译：压缩单边带通信系统及方法
公开(公告)号：US4573208A
公开(公告)日：1986-02-25
申请号：US558046
申请日：1984-01-26
申请人： Paul H. Jacobs , Douglas P. Collette
发明人： Paul H. Jacobs , Douglas P. Collette
IPC分类号： H04B1/64 , H04B1/68 , H04B1/76 , H04B7/00
CPC分类号： H04B1/64 , H04B1/68
摘要： A compressed single side band communication system and method in which the audio signal is compressed prior to pre-emphasis and thereafter summed with a pilot tone for further compression prior to transmission. Initially, only the pilot tone is transmitted at full rated power to aid in acquisition of the signal by the receiver. Thereafter, the transmitter ALC is disabled and the pilot tone is attenuated. The receiver adjusts the frequency characteristics of the pilot tone filter and phase lock loop filter in the detector as a function of lock-on. The delay after loss of lock-on in reverting to wide band pilot tone and wideband loop filters is varied as a function of signal strength. The pilot tone may be modulated for tone coded squelch. The modulating source is located in the return end of the phase lock loop filter. A unique filter is provided to insure acquisition of the pilot tone. Automatic gain control of the audio signal is responsive to the tone signal without affecting the composite audio and tone signal.
摘要翻译：一种压缩单边带通信系统和方法，其中音频信号在预加重之前被压缩，然后在传输之前与用于进一步压缩的导频音相加。最初，只有导频音以全额定功率传输，以帮助接收机获取信号。此后，发射机ALC被禁用并且导频音被衰减。接收机调节检测器中导频音滤波器和锁相环滤波器的频率特性，作为锁定功能。作为信号强度的函数，响应于宽带导频和宽带环路滤波器的锁定失去锁定之后的延迟是变化的。可以对导频音进行调制，进行音调编码的静噪。调制源位于锁相环滤波器的返回端。提供一个唯一的滤波器来确保采集导频音。音频信号的自动增益控制响应于音调信号而不影响复合音频和音调信号。

3. 发明授权

US4876741A Method of receiving a compressed composite signal 失效
标题翻译：接收压缩复合信号的方法
公开(公告)号：US4876741A
公开(公告)日：1989-10-24
申请号：US87914
申请日：1987-08-21
申请人： Paul H. Jacobs , Douglas P. Collette
发明人： Paul H. Jacobs , Douglas P. Collette
IPC分类号： H04B1/64 , H04B1/68
CPC分类号： H04B1/68 , H04B1/64
摘要： A compressed single side band communication system and method in which the audio signal is compressed prior to pre-emphasis and thereafter summed with a pilot tone for further compression prior to transmission. Initially, only the pilot tome is transmitted at full rated power to aid in acquisition of the signal by the receiver. Thereafter, the transmitter ALC is disabled and the pilot tone is attenuated. The receiver adjusts the frequency characteristics of the pilot tone filter and phase lock loop filter in the detector as a function of lock-up. The delay after loss of lock-on in reverting to wide band pilot tone and wideband loop filters is varied as a function of signal strength. The pilot tone may be frequency modulated for tone coded squelch, with the modulating source being located in the return end of the phase lock loop filter. A unique filter is provided to insure acquisition of the pilot tone. Automatic gain control of the audio signal is responsive to the tone signal without affecting the composite audio and tone signal. The audio signal and pilot tone may be weighted and summed to maintain a constant amplitude signal to the squelch detector to reduce undesired operation in the presence of audio peaks.
摘要翻译：一种压缩单边带通信系统和方法，其中音频信号在预加重之前被压缩，然后在传输之前与用于进一步压缩的导频音相加。最初，只有飞行员在全额定功率下传输，以帮助接收机获取信号。此后，发射机ALC被禁用并且导频音被衰减。接收机调节检测器中导频音滤波器和锁相环滤波器的频率特性，作为锁定的功能。作为信号强度的函数，响应于宽带导频和宽带环路滤波器的锁定失去锁定之后的延迟是变化的。导频音调可以对音调编码的静噪进行频率调制，调制源位于锁相环滤波器的返回端。提供一个唯一的滤波器来确保采集导频音。音频信号的自动增益控制响应于音调信号而不影响复合音频和音调信号。可以对音频信号和导频音进行加权和求和，以将静态幅度信号维持到静噪检测器，以减少存在音频峰值的不期望的操作。

4. 发明授权

US4539707A Compressed single side band communications system and method 失效
标题翻译：压缩单边带通信系统及方法
公开(公告)号：US4539707A
公开(公告)日：1985-09-03
申请号：US384148
申请日：1982-06-01
申请人： Paul H. Jacobs , Douglas P. Collette
发明人： Paul H. Jacobs , Douglas P. Collette
IPC分类号： H04B1/40 , H04B1/64 , H04B1/68 , H04B1/00 , H04B1/16 , H04B1/76
CPC分类号： H04B1/68 , H04B1/64
摘要： A compressed single side band communication system and method in which the audio signal is compressed prior to pre-emphasis and thereafter summed with a pilot tone for further compression prior to transmission. Initally, only the pilot tone is transmitted at full rated power to aid in acquisition of the signal by the receiver. Thereafter, the transmitter ALC is disabled and the pilot tone is attenuated. The receiver adjusts the frequency characteristics of the pilot tone filter and phase lock loop filter in the detector as a function of lock-on. The delay after loss of lock-on in reverting to wide band pilot tone and wideband loop filters is varied as a function of signal strength. The pilot tone may be modulated for tone coded squelch. The modulating source is located in the return end of the phase lock loop filter. A unique filter is provided to insure acquisition of the pilot tone. Automatic gain control of the audio signal is responsive to the tone signal without effecting the composite audio and tone signal.
摘要翻译：一种压缩单边带通信系统和方法，其中音频信号在预加重之前被压缩，然后在传输之前与用于进一步压缩的导频音相加。最初，只有导频音以全额定功率传输，以帮助接收机获取信号。此后，发射机ALC被禁用并且导频音被衰减。接收机调节检测器中导频音滤波器和锁相环滤波器的频率特性，作为锁定功能。作为信号强度的函数，响应于宽带导频和宽带环路滤波器的锁定失去锁定之后的延迟是变化的。可以对导频音进行调制，进行音调编码的静噪。调制源位于锁相环滤波器的返回端。提供一个唯一的滤波器来确保采集导频音。音频信号的自动增益控制响应于音调信号，而不影响复合音频和音调信号。

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